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https://github.com/splunk/security_content
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Patrick Bareiss
46 lines
2.1 KiB
YAML
46 lines
2.1 KiB
YAML
name: Detect PsExec With accepteula Flag
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id: b89919ed-fe5f-492c-b139-151xb162040e
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version: 2
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date: '2019-02-26'
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description: This search looks for events where `PsExec.exe` is run with the `accepteula`
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flag in the command line. PsExec is a built-in Windows utility that enables you
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to execute processes on other systems. It is fully interactive for console applications.
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This tool is widely used for launching interactive command prompts on remote systems.
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Threat actors leverage this extensively for executing code on compromised systems.
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If an attacker is running PsExec for the first time, they will be prompted to accept
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the end-user license agreement (EULA), which can be passed as the argument `accepteula`
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within the command line.
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how_to_implement: You must be ingesting data that records process activity from your
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hosts to populate the Endpoint data model in the Processes node. You must also be
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ingesting logs with both the process name and command line from your endpoints.
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The command-line arguments are mapped to the "process" field in the Endpoint data
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model.
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type: ESCU
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references: []
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author: Bhavin Patel, Splunk
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search: '| tstats `security_content_summariesonly` values(Processes.process) as process
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min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes
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where Processes.process_name = PsExec.exe Processes.process = "*accepteula*" by
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Processes.process_name Processes.dest Processes.parent_process_name | `drop_dm_object_name(Processes)`|
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`security_content_ctime(firstTime)`| `security_content_ctime(lastTime)` | `detect_psexec_with_accepteula_flag_filter`'
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known_false_positives: Administrators can leverage PsExec for accessing remote systems
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and might pass `accepteula` as an argument if they are running this tool for the
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first time. However, it is not likely that you'd see multiple occurrences of this
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event on a machine
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tags:
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analytics_story:
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- SamSam Ransomware
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- DHS Report TA18-074A
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mitre_attack_id:
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- T1059.003
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- T1059.001
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kill_chain_phases:
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- Actions on Objectives
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cis20:
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- CIS 8
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nist:
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- PR.PT
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- DE.CM
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security_domain: endpoint
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asset_type: Endpoint
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